Experiment Study Of The Feedstock Character Effect On Composite Coating Deposition By Cold Spray

Cold spray is a promising new type of functional coating fabrication technology. In this paper, the composite Cu+Al2O3 coating was prepared by cold spray and the deposition characteristics were studied by the examination of the microstructure of the coating. Results showed that feedstock character has an important effect on the quality of the coating. Compared with Cu and Al2O3 coating, the composite feedstock needs higher impact velocity in order to overcome surface oxidation of Cu and smashing of Al2O3 to form valid bonding between the coating with substrate and within the coating. This study can be used for reference in the fabrication of metal-ceramic composite functional coating by cold spray technology.